OSI Reference Model and it’s 7 Layers
For standardizing networking of devices from different vendors the Open Systems Interconnection (OSI) reference model was defined by International Organization for Standardization (ISO) ...
Cisco Certifications
Internet Protocols Cheat Sheet
If you do forget the ports used by protocols or the function of internet protocols, don't worry i have compiled a list of all the possible commonly used protocols along with the port used by ...